IEEE C63.4-2009

C63.4-2009 is a technical standard for voltage electrical and electronic equipment in the range of 9 kHz to 40 GHz, placing it firmly in the fields, waves, and electromagnetics context. It is relevant where controlled testing, measurement, or evaluation of equipment behavior is needed across a wide frequency span. As a superseded document, C63.4-2009 remains useful for identifying older requirements and understanding how electromagnetic test practices were defined in this version.

Overview of C63.4-2009

This standard addresses the electromagnetic testing context for electrical and electronic equipment operating over low radio frequencies through microwave ranges. C63.4-2009 is typically used as a reference for how measurements are organized, what frequency coverage is considered, and how results are compared against defined requirements. In practice, it helps create a common technical basis for evaluating voltage-related behavior and electromagnetic characteristics within the stated 9 kHz to 40 GHz range.

Typical use cases

C63.4-2009 is commonly relevant when reviewing test plans for electronic devices, laboratory measurement setups, or compliance-oriented engineering work involving electromagnetic fields and waves. It may be used for equipment such as control units, communication-related electronics, industrial devices, or other products that must be assessed across a broad frequency range. The standard can also support documentation review, legacy compliance work, and procurement decisions where a specific historical technical reference is needed.

Why it matters

Using a clearly defined standard like C63.4-2009 helps reduce ambiguity in testing and technical evaluation. It supports consistency in how equipment is measured, compared, and documented, which is important for compliance workflows and engineering control. For teams handling legacy products or archived requirements, the superseded status still matters because prior design decisions, test records, and certification references may depend on this version. That makes C63.4-2009 valuable for traceability and risk reduction.

• Frequency range: 9 kHz to 40 GHz
• Electrical and electronic equipment focus
• Fields, waves, and electromagnetics context
• Useful for legacy compliance reference
• Superseded technical document